docs: def makeLeader(self, node_id):
          """
          Add an annotation property to the given ```node_id```
          to be the clique_leader.
          This is a monarchism.
          :param node_id:
          :return:
          """
          self.graph.addTriple(
              node_id, self.globaltt['clique_leader'], True, object_is_literal=True,
              literal_type='xsd:boolean')